/*

   Copyright 2001  The Apache Software Foundation 

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.apache.batik.parser;

import java.io.*;

import org.apache.batik.test.*;

/**
 * To test the length parser.
 *
 * @author <a href="mailto:stephane@hillion.org">Stephane Hillion</a>
 * @version $Id$
 */
public class LengthParserTest extends AbstractTest {

    protected String sourceLength;
    protected String destinationLength;

    protected StringBuffer buffer;
    protected String resultLength;

    /**
     * Creates a new LengthParserTest.
     * @param slength The length to parse.
     * @param dlength The length after serialization.
     */
    public LengthParserTest(String slength, String dlength) {
        sourceLength = slength;
        destinationLength = dlength;
    }

    public TestReport runImpl() throws Exception {
        LengthParser pp = new LengthParser();
        pp.setLengthHandler(new TestHandler());

        try {
            pp.parse(new StringReader(sourceLength));
        } catch (ParseException e) {
            DefaultTestReport report = new DefaultTestReport(this);
            report.setErrorCode("parse.error");
            report.addDescriptionEntry("exception.text", e.getMessage());
            report.setPassed(false);
            return report;
        }

        if (!destinationLength.equals(resultLength)) {
            DefaultTestReport report = new DefaultTestReport(this);
            report.setErrorCode("invalid.parsing.events");
            report.addDescriptionEntry("expected.text", destinationLength);
            report.addDescriptionEntry("generated.text", resultLength);
            report.setPassed(false);
            return report;
        }

        return reportSuccess();
    }

    class TestHandler extends DefaultLengthHandler {
        public TestHandler() {}

        public void startLength() throws ParseException {
            buffer = new StringBuffer();
        }
        
        public void lengthValue(float v) throws ParseException {
            buffer.append(v);
        }

        public void em() throws ParseException {
            buffer.append("em");
        }

        public void ex() throws ParseException {
            buffer.append("ex");
        }

        public void in() throws ParseException {
            buffer.append("in");
        }

        public void cm() throws ParseException {
            buffer.append("cm");
        }

        public void mm() throws ParseException {
            buffer.append("mm");
        }

        public void pc() throws ParseException {
            buffer.append("pc");
        }

        public void pt() throws ParseException {
            buffer.append("pt");
        }

        public void px() throws ParseException {
            buffer.append("px");
        }

        public void percentage() throws ParseException {
            buffer.append("%");
        }

        public void endLength() throws ParseException {
            resultLength = buffer.toString();
        }
    }
}
